Suppose all individuals are​ identical, and their monthly demand for Internet access from a certain leading provider can be represented as p​ = 5 minus − one half 1 2 q where p is price in​ $ per hour and q is hours per month. The firm faces a constant marginal cost of​ $1. The profit maximizing two minus −part pricing results in the firm selling

A. 5 hours.
B. 10 hours.
C. 8 hours.
D. 4.5 hours.